Multi-layer structure solid golf ball

Abstract

A multi-layer structure solid golf ball is composed of a solid core (2), an intermediate layer (3), and a cover (4). An adhesive layer (5) is interposed between the intermediate layer (3) and the cover (4). The intermediate layer may be formed from an ionomer or a urethane resin, or a polyester resin. The cover may be formed of an ionomer or a polyester elastomer or a urethane resin. The adhesive is selected from the group consisting of epoxy resin adhesives, urethane resin adhesives, vinyl resin adhesives and rubber adhesives.

What is claimed is: 
     
       1. A multi-layer structure solid golf ball comprising: a solid core, an intermediate layer and a cover, said intermediate layer being formed of a material selected from the group consisting of an ionomer resin, urethane resin and polyester elastomer and having a thickness in the range of 1 to 15 mm, said cover being formed of a material selected from the group consisting of an ionomer resin and urethane resin and having a thickness in the range of 0.7 to 3 mm, wherein said cover is formed of a material different from that of said intermediate layer, and an adhesive layer interposed between said intermediate layer and said cover. 
     
     
       2. The golf ball of claim 1, wherein said adhesive is selected from the group consisting of epoxy resin adhesives, urethane resin adhesives, vinyl resin adhesives and rubber adhesives. 
     
     
       3. The golf ball of claim 1 wherein said adhesive layer has a thickness in the range of 5 to 300 μm. 
     
     
       4. The golf ball of claim 1 wherein said core has a distortion of 1.0 to 10.0 mm under a load of 100 kg. 
     
     
       5. The golf ball of claim 1 wherein one of the intermediate layers and the cover is formed of an ionomer resin and the other is formed of a urethane resin. 
     
     
       6. The golf ball of claim 5 wherein the intermediate layer is formed of a polyester elastomer and the cover is formed of a urethane resin. 
     
     
       7. The golf ball of claim 1 wherein the intermediate layer is formed of a polyester resin and the cover is formed of an ionomer resin.